Superheater



(No Model.)

J. FISH.

SUPERHEATER. No. 255,271. Patented Mar. 21,1882.

WITNESSES INVENTOR:

ATTORNEYS.

UNITED STATES PATENT OFFICE.

JOHN FISH, or SUMMIT, NEW JERSEY.

SUPERHEATER.

SPECIFICATION forming part of Letters Patent No. 255,271, dated March21, 1882.

Application filed August 2, [881. (No model.)

To all whom it may concern:

Be it known that I, JOHN FISH, of Summit, in the county of Union andState of New Jersey, have invented certain new and useful Improvementsin Combined Steam Generators and Superheaters, of which the following isa specification.

The drawing is a side elevation of my improvement, partly in section.

The object of this invention is to furnish an improved steam generatorand snperheater; and to this end the invention consists in thecombination, with the valved pipe connecting the generator andsuperheater and the valved discharge pipe of the superheater, of acheckvalve and a safety-valve located in the said pipes between the saidvalves and the superheating-pipe, whereby the steam can be heated to anydesired temperature to the point at which the safety-valve is setwithout causing a back flow of steam into the generator, as will behereinafter fully described.

In the drawing, A represents the s eam-generator, from the steam-spaceof which a pipe, B, leads to the pipe 0, coiled within the furnace D,and forming the super-heater. From the coil 0 a pipe, E, leads to theplace where the steam is to be used. The generator A is provided with asafety-valve, F, in the ordinary manner. The pipe B is provided with astop-valve, G, for preventing the escape of steam from the generator A,when desired.

- The pipe B is also provided with a check valve,

H,ope'ning toward thesuperheater. The discharge-pipe E of thesuperheater is provided with a throttle-valve, I, so that thesuperheated steam can be detained in the superheater until raised to thedesired'temperature. The discharge-pipe E, between the throttle-valve Iand the snperheating-coil O, is provided with a safety-valve, J, toprevent the pressure of steam in the superheater from rising to adangerous height.

With this construction, when the throttlevalve 1 is closed the steam canbe superheated until its pressure reaches the point at which thesafety-valve J is set, and can be drawn oft whenever desired by openingthe throttlevalve I.

With this construction the check-valve H prevents any back-pressure uponthe generator from the superheated steam, so that a generator ofordinary strength can he used.

With this construction, also, when the superheated steam has been drawnoff by opening the throttle-valve I the pressure upon the side of thecheek-valve H next the superheater becomes less than the pressure uponthe side next the generator, so that the said checkvalve will openautomatically and admit another supply of steam to the superheater, thesaid check-valve remaining open until the steam-pressure in thesnperheater again becomes greater than the pressure in the generator,when the said valve again closes and the steam can be again heated tothe desired point. r

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- In a combined steam generator and superheater,the combination, with the superheaterpipe (3 and the pipesB E, providedwith valves G I, of the check-valve H and the safety-valve J, located inthe said pipes between the said valves and the superheating-pipe,substantially as and for the purpose set forth.

JOHN FISH. Witnesses:

JAMES T. GRAHAM, O. SEDGwIcK.

